Seven-Coloring of a Torus
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This Demonstration shows a seven-coloring of a torus, which means that each of the seven colored regions touches all the others.
Contributed by: Izidor Hafner (January 2012)
Open content licensed under CC BY-NC-SA
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"Seven-Coloring of a Torus"
http://demonstrations.wolfram.com/SevenColoringOfATorus/
Wolfram Demonstrations Project
Published: January 31 2012